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Lithium Depletion and the Rechargeability of Li–O 2 Batteries in Ether and Carbonate Electrolytes
Author(s) -
Jang IlChan,
Ida Shintaro,
Ishihara Tatsumi
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500110
Subject(s) - electrolyte , ethylene carbonate , dimethyl carbonate , inorganic chemistry , chemistry , solvent , ether , dimethyl ether , lithium (medication) , carbonate , reactivity (psychology) , passivation , metal , battery (electricity) , lithium carbonate , decomposition , anode , diethyl carbonate , ethylene glycol , organic chemistry , methanol , electrode , ion , layer (electronics) , ionic bonding , medicine , power (physics) , physics , alternative medicine , pathology , quantum mechanics , endocrinology
Li metal is a highly promising candidate anode material because of its high energy density. However, Li depletion caused by the formation of a passivation layer and dendrites prevent the use of Li metal for rechargeable batteries. In this study, we investigate Li depletion in practical Li–O 2 batteries by using two typical electrolytes, carbonate and ether, under high Li utilization. The ether‐based solvent tetraethylene glycol dimethyl ether (TEGDME) showed greatly increased levels of Li depletion through the formation of both solid electrolyte interphase (SEI) layers and dendrites than carbonated‐based solvents (ethylene carbonate/diethyl carbonate (EC/DEC)). Although TEGDME is known as a stable solvent for oxygen reduction species, it may be less appropriate as a solvent with respect to Li reactivity, which is very important for the cycle stability of Li–O 2 battery systems. In contrast, although slight decomposition of EC‐DEC was observed, cells constructed with EC‐DEC were found to be more stable than those with TEGDME for Li–O 2 batteries.